Let's think about what our Player class will need to do. The class will need to know how fast it can move, where in the game world it currently is, and how much health it has. As the Player class, in the player's eyes, is represented as a 2D graphical character, the class will need both a Sprite and a Texture object.

Furthermore, although the reasons might not be obvious at this point, our Player class will also benefit from knowing a few details about the overall environment the game is running in. These details are screen resolution, the size of the tiles that make up an arena, and the overall size of the current arena.

As the Player class will be taking full responsibility for updating itself each frame, it will need to know the player's intentions at any given moment. For example, is the player currently holding down a particular keyboard direction key? Or is the player currently holding down multiple keyboard direction keys? Boolean variables to determine...